What's The Largest Planet In The Universe?

 In our solar system, Jupiter is the largest planet we have, but what is the upper limit of planet size?

Jupiter, largest planet in the solar system

If you gather too much mass in an object, its core will fuse lighter elements into heavier elements.

The mass is about 80 times that of Jupiter, and you will have a real star that burns hydrogen into helium.

But below this value, which is about 14 times the mass of Jupiter, you will start deuteron fusion, and the remaining fuel from the big bang will slowly generate energy on its own.

Planets by size comparison

This line between the gas giant and the brown dwarf defines the largest planet.

However, in terms of physical size, brown dwarfs are actually smaller than the largest gas giant planets.

Above a certain mass, the atoms inside the large planet will begin to compress severely, and adding more mass will actually shrink your planet.

This happens in our solar system, which explains why Jupiter is three times the mass of Saturn, but only 20% physically.

But many planets in the solar system are made of lighter elements and do not have large rock cores inside.

Therefore, the largest planet can reach twice the size of Jupiter before it becomes a star.


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